In natural gas production facilities, separators are primarily used to separate produced water from the gas fields, which are then discharged into produced water ponds through the drainage system. Impurities in the produced water can cause malfunctions in the drainage system, severely affecting the monitoring and automated discharge of the water. This study investigates the causes of these system failures through onsite research. The study then proposes optimization measures such as improving the sealing ring materials of pneumatic drainage valves, enhancing the maintenance of these valves, adding filtration devices, and optimizing the structure of magnetic floats.